›› 2007, Vol. 28 ›› Issue (2): 381-385.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Test study on permeability properties of coal specimen in complete stress-strain process

YANG Yong-jie, SONG Yang, CHEN Shao-jie   

  1. Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao 266510, China
  • Received:2005-06-01 Online:2007-02-10 Published:2013-08-28

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Abstract: The permeability test of coal in the complete stress-strain process is carried on the MTS815 Servo-controlled Rock Mechanical Test System. Test results indicate that the permeability rate curve and the complete stress-strain curve of coal almost have the same variation trend. But the permeability rate-strain curve is relatively “hysteretic” which indicates that the close relativity between the evolvement of damage and the development of permeability rate and the permeability developing needs a time. The micro-structure and micro-composition of coal are more complicated and different than other sedimentary rocks; so the permeability of different kinds of coal is much different. Moreover, the micro-porosity and micro-fracture of coal are more developed, so the influence of available confining pressure on penetrability of coal is more obviously.

Key words: coal, complete stress-strain process, permeability, confining pressure

CLC Number: 

  • TU 451
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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